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https://doi.org/10.1109/TMAG.2003.814287
Title: | Feedforward control for reducing disk-flutter-induced track misregistration | Authors: | Guo, G. Zhang, J. |
Keywords: | Disk flutter Hard disk drive Multisensing servo Servo control system Vibration control |
Issue Date: | Jul-2003 | Citation: | Guo, G., Zhang, J. (2003-07). Feedforward control for reducing disk-flutter-induced track misregistration. IEEE Transactions on Magnetics 39 (4 II) : 2103-2108. ScholarBank@NUS Repository. https://doi.org/10.1109/TMAG.2003.814287 | Abstract: | We show in this paper that the disk vertical vibration signal picked from the slider in a hard disk drive has a fairly good correlation to the track misregistration at the disk flutter frequencies. We propose to introduce a feedforward controller into the usual servo loop to reduce disk-flutter-induced track misregistration (TMR). The feedforward controller is an approximated differential element with the disk vertical direction velocity as input. In our experimental setup, we show that such a method can reduce the TMR induced by the first four disk flutter modes by an average of about 56%. The method can potentially be used in high-track-per-inch servo track writers to reduce the written-in repeatable runouts. | Source Title: | IEEE Transactions on Magnetics | URI: | http://scholarbank.nus.edu.sg/handle/10635/56041 | ISSN: | 00189464 | DOI: | 10.1109/TMAG.2003.814287 |
Appears in Collections: | Staff Publications |
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